Amino Acid and Nucleotide Biosynthesis

Organisms vary in their ability to synthesize the 20 common amino acids, but most bacteria and plants can synthesize all 20.

Unlike pyrimidines, purines are biologically synthesized as nucleotides and in particular as ribotides.

Nonribosomal peptides (NRP) are a class of peptide secondary metabolites which can function as antibiotics.

Porphyrins are the conjugate acids of ligands that bind metals to form complexes.